Large bulk cargo ship with methanol fuel cabin located in front of living building
By placing the methanol fuel tank in front of the living building on a large bulk carrier and adopting a double-layer bulkhead and isolation capsule design, the impact of the methanol fuel tank position on the ship's model competitiveness and the risk of high temperature of the stern shaft is achieved, and more efficient space utilization and safe escape passage.
Patent Information
- Application Number
- CN202420827365.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-19
- Publication Date
- 2025-02-07
- Estimated Expiration
- 2034-04-19
AI Technical Summary
When designing a methanol fuel bulk carrier, if the location of the methanol fuel tank is set on the cargo tank area or on the open main deck, it will lead to an increase in cargo tank space occupation, a decrease in the competitiveness of the ship type, and an increase in the risk of high temperature of the stern shaft.
Place the methanol fuel tank on the stern deck of the large bulk carrier in front of the living building, adopting a double-layer bulkhead design, and an isolation vacant tank is set between the outer bulkhead and the inner bulkhead of the methanol fuel tank, and the bottom and the cargo tank are set at the intersection. The bottom of the triangle isolates the vacant capsule to reduce the risk of total longitudinal bending moment of the hull beam and the stern high temperature.
It effectively reduces the overall longitudinal bending moment of the hull beam and the high temperature of the stern shaft, meets the endurance needs of large bulk carriers, and avoids the impact of the methanol fuel compartment on deck loading and unloading, ensuring a safe passage for personnel to escape.
Smart Images
Figure CN222432518U_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the field of methanol fuel ship construction and design, and in particular relates to a bulk carrier with a methanol fuel tank located in front of a living building. Background Art
[0002] Regarding the design of methanol fuel bulk carriers, if the methanol fuel tank is set in the cargo hold area, it will occupy the cargo hold space, reduce the cargo hold capacity, and deteriorate the cargo suitability of the ship, resulting in reduced competitiveness of the ship type. If it is set on the open main deck, due to the operational requirements of the cargo hold hatch cover, it can only be arranged on the aft deck. However, the aft deck also needs to be arranged with the aft mooring, stern throwing boat and living building. Therefore, the design of the methanol fuel bulk carrier needs to meet the ship's endurance requirements and the basic living and escape needs of the ship in the limited aft deck space. Therefore, innovative and reasonable designs are needed to meet the actual needs of large methanol fuel bulk carriers. According to the orientation of the methanol fuel tank and the superstructure, the optional layout schemes and existing ones are:
[0003] 1) The fuel tank is arranged behind the superstructure, which is equivalent to adding about 6,000 tons of weight to the stern, resulting in a sharp increase in the mid-arch bending moment. At the same time, about 6,000 tons of weight is concentrated in the intermediate shaft and stern shaft area, which can easily cause high temperature of the stern shaft and lead to design failure.
[0004] 2) The fuel tanks are arranged on both sides of the superstructure, which can relatively alleviate the problem mentioned in 1). However, the two fuel tanks are set separately, which requires two sets of completed outer bulkhead designs and spaces, resulting in increased structural weight and waste of space. This is contrary to the capacity expansion route that the methanol fuel solution for large bulk carriers has been seeking, and is not the preferred option.
[0005] The fuel tank is arranged in front of the superstructure. Compared with the solution described in 1), the arch bending moment is reduced by about 10%, and the weight distribution position is moved forward to avoid the position of the shaft, which greatly reduces the possibility of high temperature of the stern shaft. At the same time, the fuel tank is arranged in front of the superstructure, and the passages for personnel escape, as well as the main activity areas such as the cabin and the living area are all outside the fuel tank range, making the design safer and more convenient. The problem is that the fuel tank is arranged in front of the superstructure, which affects the lighting of the living building. Summary of the invention
[0006] In order to solve the above problems, the present invention provides a bulk carrier with a methanol fuel tank located in front of a living building, aiming to achieve the purpose of satisfying the requirements of large bulk carriers in terms of endurance and satisfying the functional and regulatory requirements of the living building. The technical solution adopted is:
[0007] A large bulk carrier with a methanol fuel tank located in front of a living building. The methanol fuel tank is located above the rear deck of the large bulk carrier and in front of the living building, and the engine room shed and chimney are arranged behind the living building.
[0008] The methanol fuel tank has double bulkheads, namely the inner bulkhead and the outer bulkhead. All the structural parts in the inner bulkhead are turned outward and located between the inner bulkhead and the outer bulkhead. A circle of isolation empty tanks is wrapped around the circumference of the outer bulkhead of the methanol fuel tank. The deck serves as the bottom bulkhead of the methanol fuel tank. A fuel preparation room is set on the top of the inner bulkhead of the methanol fuel tank. The outer bulkhead of the methanol fuel tank wraps the outside of the fuel preparation room. A methanol daily tank is set in the fuel preparation room.
[0009] A bottom isolation void compartment is provided at the intersection of the bottom of the methanol fuel tank and the cargo hold. The bottom isolation void compartment is located inside the cargo hold. The longitudinal section of the bottom isolation void compartment is triangular, and the inclined bulkhead of the bottom isolation void compartment forms an angle of 30° with the horizontal plane.
[0010] The above-mentioned methanol fuel tank is located in a large bulk carrier in front of the living building. Furthermore, the distance between the outer bulkhead and the inner bulkhead of the methanol fuel tank is 1m to 2m.
[0011] The above-mentioned methanol fuel tank is located in the large bulk carrier in front of the living building. Furthermore, the top fixed position of the inclined bulkhead of the isolation empty tank does not exceed the hatch end beam of the cargo hold.
[0012] The above-mentioned methanol fuel tank is located in a large bulk carrier in front of the living building. Furthermore, a stern mooring system and a stern throwing boat are arranged in sequence behind the engine room shed and the chimney, and the distance between the rear wall of the engine room shed and the chimney and the stern sealing plate is ≥9.5m.
[0013] The above-mentioned methanol fuel tank is located in a large bulk carrier in front of the living building. Furthermore, the height of the methanol fuel tank is 3 to 4 stories of the living building.
[0014] The above-mentioned methanol fuel tank is located in a large bulk carrier in front of the living building. Furthermore, a fuel pump, a fuel supply system, and a main engine gas valve group are arranged in the fuel preparation room.
[0015] The above-mentioned methanol fuel tank is located in a large bulk carrier in front of the living building. Furthermore, there is a 2-rib spacing between the engine room shed and the chimney and the living building.
[0016] The above-mentioned methanol fuel tank is located in a large bulk carrier in front of the living building. Furthermore, a skylight is arranged on the top of the engine room, and a hanging opening is opened on the top of the skylight. The hanging opening is located between the living building and the methanol fuel tank, and the isolation empty tank is located between the hanging opening and the methanol fuel tank.
[0017] The above-mentioned methanol fuel tank is located in the large bulk carrier in front of the living building. Furthermore, a deck longitudinal girder is arranged below the methanol fuel tank and in the cargo hold hatch area.
[0018] The above-mentioned methanol fuel tank is located in a large bulk carrier in front of the living building. Furthermore, drainage plugs are arranged around the patio, and the drainage plugs are connected to the outboard drainage pipe.
[0019] Compared with other bulk carriers with methanol fuel tanks arranged on the aft deck, the present invention can effectively reduce the total longitudinal bending moment of the hull beam and avoid high temperature of the stern shaft. The space of the stern deck is fully utilized, which not only meets the endurance requirements of large bulk carriers, but also avoids the influence of the setting of the methanol fuel tank on deck loading and unloading. The methanol fuel tank is moved forward, which effectively reduces the total longitudinal bending moment of the hull beam and avoids high temperature of the stern shaft; the passages of the living building, the cabin shed and the chimney and the escape route of personnel do not pass through the fuel space, which is safer. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 This is a side view of the methanol fuel tank layout;
[0021] Figure 2 This is a main deck view of the methanol fuel tank layout;
[0022] Figure 3 It is a schematic diagram of the bottom isolation void structure;
[0023] Figure 4 yes Figure 2 Schematic diagram of the medium AA viewing angle structure;
[0024] Among them, 1-methanol fuel tank, 2-fuel preparation room, 3-methanol daily tank, 4-living building, 5-engine shed and chimney, 6-stern throwing boat, 7-stern mooring, 8-bottom isolation empty tank, 9-lifting port, 10-drainage plug, 11-outboard drain pipe. DETAILED DESCRIPTION
[0025] The present invention will be further described in conjunction with the accompanying drawings.
[0026] A large bulk carrier with a methanol fuel tank located in front of the living building, such as Figure 1 , 2 As shown, on the rear deck of a large bulk carrier, from the stern to the bow, a stern jettison boat 6, a stern mooring 7, an engine room shed and chimney 5, a living building 4, and a methanol fuel tank 1 are arranged in sequence. The methanol fuel tank is partially located on the cargo hold area deck to expand the volume of the methanol fuel tank and increase the endurance.
[0027] The methanol fuel tank has double bulkheads made of marine steel, which are the inner bulkhead and the outer bulkhead. All the structural parts in the inner bulkhead are turned outward and located between the inner and outer bulkheads. The inner bulkhead structure is turned outward, and the interior remains smooth, which is conducive to the construction of methanol-resistant coating and reduces the residual methanol fuel in the tank. The outer bulkhead prevents mechanical damage and collects the leaked fuel in a special collection tank. At the same time, the range of the danger zone is controlled between the double bulkheads, which is conducive to layout.
[0028] An isolation void is set along the circumference of the outer bulkhead of the methanol fuel tank. The isolation void wraps the methanol fuel tank and isolates the methanol fuel tank from the living building. The deck serves as the bottom bulkhead of the methanol fuel tank, which ensures the structural continuity of the main deck and makes the most of the open space above the main deck. A fuel preparation room is set on the top of the inner bulkhead of the methanol fuel tank. The outer bulkhead of the methanol fuel tank wraps the outside of the fuel preparation room. A methanol daily tank is set in the fuel preparation room.
[0029] A circle of isolation chambers is arranged along the circumference of the outer bulkhead of the methanol fuel tank. A bottom isolation chamber 8 is arranged at the intersection of the bottom of the methanol fuel tank and the cargo hold. The bottom isolation chamber is located inside the cargo hold. The longitudinal section of the bottom isolation chamber is triangular. The upper fixed position of the inclined bulkhead of the bottom isolation chamber does not exceed the hatch end beam, and the inclined bulkhead forms an angle of 30° with the horizontal plane. Such an arrangement does not affect the cabin hoisting height, and can fully utilize the cabin space. The side slope of the bottom isolation chamber 8 utilizes the original cargo hold bulkhead of the bulk carrier, which saves structure while ensuring the continuity of the hull structure. Figure 4 As shown, in the bottom isolation space 8, deck longitudinal girders are arranged below the fuel tank and in the hatch area to support the fuel tank, and the structure in the top side tank area is continuous with the cargo hold area.
[0030] The fuel supply pipeline enters the cabin through the bottom isolation compartment to supply fuel to the users. The relevant valve group on the fuel supply pipeline is arranged in the bottom isolation compartment 8, away from the cabin to ensure safety.
[0031] The front bulkhead of the methanol fuel tank is set on the deck of the cargo hold area. Under the premise of not affecting the loading and unloading of the cargo hold, the open space above the main deck of the cargo hold area is fully utilized to expand the capacity of the methanol fuel tank. It is recommended that the height of the inner bulkhead does not need to be higher than the C deck of the living cabin (that is, the height of the methanol fuel tank is about 3 to 4 floors of the living building), so as to ensure the functional design of the living building while expanding the capacity of the methanol fuel tank. A methanol daily tank 3 and a fuel preparation room 2 are set above the top plate of the inner bulkhead, and there is no need to set up an isolated empty tank to save space. The methanol daily tank can be an independent tank and arranged in the fuel preparation room. At the same time, relevant fuel supply equipment such as a fuel pump should also be set in the preparation room.
[0032] The outer bulkhead is wrapped outside the inner bulkhead, with a distance of about 1m to 2m between it and the inner bulkhead. An isolation void is set up to set up the structure to ensure the structural strength of the fuel tank.
[0033] The living building 4 is connected to the engine room shed and the chimney 5 and arranged along the transverse direction of the ship. Figure 2As shown, two rib spaces are set between the living building and the engine room shed and chimney as isolation and this space is used as a corridor. The engine room shed and chimney 5 are centrally arranged behind the living building 4, and the distance between the rear wall of the engine room shed and chimney and the stern cover plate is ≥9.5m to ensure the layout space of the stern throwing boat 6 and the stern mooring system 7. Most areas of the engine room shed and chimney are arranged above the engine room for the layout of the main engine and engine room exhaust ducts. Functional rooms such as the engine room fan room, emergency generator room, fire control station, garbage station, dressing room, stairway, elevator, electrical equipment room, deck storage room, etc. are arranged on both sides of the engine room shed and chimney to ensure full use of the space. If necessary, they can be isolated and protected from the engine room shed and chimney by setting up empty cabins.
[0034] Living building 4 has about 8 to 9 floors. There is almost no natural light in the middle area of the four floors below the living building, where a kitchen, fish, meat and vegetable storage room, laundry room, meeting room, etc. are set up. There is natural light on both sides of the outer area of the four floors below the living building, which is used to set up crew activity areas such as gymnasium and entertainment room. The air-conditioning units of the living building are set in well-ventilated positions on both sides of the main deck. The three floors above the living building have normal lighting and are used to set up crew living quarters, which can meet the crew requirements of large bulk carriers. The top floor of the living building is set as a cab to meet the field of vision and functional requirements.
[0035] The food crane adopts a rail crane, which is set under the driving deck and ≥3 living floors above the fuel tank top, which can meet the lifting height requirements of large bulk carriers; it is used for lifting objects in the engine room, and the skylight can further increase the lighting of the living area. There is a lifting port on the top of the engine room, and a skylight is set above the lifting port. Figure 4 As shown, drainage plugs are arranged around the patio, and the drainage plugs are connected to the outboard drainage pipes to drain rainwater and other accumulated water from the patio structure.
[0036] The rescue boat is set on the A deck platform, and the stern jettison boat and emergency escape passage are set on both sides of the fuel tank. Personnel can escape directly from the living area to the assembly station without passing through the methanol fuel space to ensure safety. The outdoor passage settings of the living building, engine room shed and chimney are the same as those of conventional fuel ships, and no special considerations are required due to the methanol fuel system.
[0037] The adverse effects caused by the fuel tank setting are greatly reduced, and a larger space is provided for the arrangement of the methanol fuel tank while meeting the functional requirements. At the same time, the solution provided by the present invention does not affect the setting of the passage and the escape route for personnel, optimizes the ship design, and is conducive to construction.
[0038] The present invention can solve the problem of insufficient endurance of a large bulk carrier powered by methanol fuel due to insufficient stern deck space in the prior art.
Claims
1. A large bulk carrier with a methanol fuel tank located in front of the living building, characterized in that: The methanol fuel tank (1) is located above the stern deck of a large bulk carrier and in front of a living building (4), and the engine room shed and chimney (5) are arranged behind the living building; The methanol fuel tank has double bulkheads, namely an inner bulkhead and an outer bulkhead. All structural members in the inner bulkhead are turned outward and located between the inner bulkhead and the outer bulkhead. A circle of isolation voids is wrapped around the outer bulkhead of the methanol fuel tank. The deck serves as the bottom bulkhead of the methanol fuel tank. A fuel preparation room (2) is arranged on the top of the inner bulkhead of the methanol fuel tank. The outer bulkhead of the methanol fuel tank wraps the outside of the fuel preparation room. A methanol daily tank (3) is arranged in the fuel preparation room. A bottom isolation chamber (8) is arranged at the intersection of the bottom of the methanol fuel tank and the cargo hold. The bottom isolation chamber is located inside the cargo hold. The longitudinal section of the bottom isolation chamber is triangular. The inclined bulkhead of the bottom isolation chamber forms an angle of 30° with the horizontal plane.
2. A large bulk carrier with a methanol fuel tank located in front of a living building according to claim 1, characterized in that: The distance between the outer bulkhead and the inner bulkhead of the methanol fuel tank is 1m to 2m.
3. A large bulk carrier with a methanol fuel tank located in front of a living building according to claim 1, characterized in that: The top fixed position of the inclined bulkhead of the cofferdam shall not exceed the hatch end beam of the cargo hold.
4. A large bulk carrier with a methanol fuel tank located in front of a living building according to claim 1, characterized in that: A stern mooring system (7) and a stern jettisoning boat (6) are arranged in sequence behind the engine room shed and the chimney, and the distance between the rear wall of the engine room shed and the chimney and the stern sealing plate is ≥9.5m.
5. A large bulk carrier with a methanol fuel tank located in front of a living building according to claim 1, characterized in that: The height of the methanol fuel tank is 3 to 4 floors of the living building.
6. A large bulk carrier with a methanol fuel tank located in front of a living building according to claim 1, characterized in that: The fuel preparation room is equipped with a fuel pump, fuel supply system, and main engine gas valve group.
7. A large bulk carrier with a methanol fuel tank located in front of a living building according to claim 1, characterized in that: There is a 2-rib spacing between the engine room shed and chimney and the living building.
8. A large bulk carrier with a methanol fuel tank located in front of a living building according to claim 1, characterized in that: A skylight is arranged on the top of the engine room, and a hanging opening (9) is opened on the top of the skylight. The hanging opening is located between the living building and the methanol fuel tank, and the isolation air tank is located between the hanging opening and the methanol fuel tank.
9. A large bulk carrier with a methanol fuel tank located in front of a living building according to claim 1, characterized in that: Deck longitudinal girders are provided below the methanol fuel tank and in the cargo hold hatch area.
10. A large bulk carrier with a methanol fuel tank located in front of a living building according to claim 8, characterized in that: Drainage plugs (10) are arranged around the patio and are connected to an outboard drainage pipe (11).